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Capillary electrophoresis-heat working electrode- ampere testing apparatus and heat working electrode preparation method

A production method and amperometric detection technology, applied in the field of chemical analysis, can solve problems such as inability to carry out work, and achieve the effects of easy control of electrode temperature, accurate temperature and strong separation ability.

Inactive Publication Date: 2010-12-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present domestic and foreign laboratories and related scientific research institutions do not have a simple device to connect capillary electrophoresis, thermal working electrodes, and amperometric detectors, resulting in the inability to carry out a lot of related work

Method used

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  • Capillary electrophoresis-heat working electrode- ampere testing apparatus and heat working electrode preparation method
  • Capillary electrophoresis-heat working electrode- ampere testing apparatus and heat working electrode preparation method
  • Capillary electrophoresis-heat working electrode- ampere testing apparatus and heat working electrode preparation method

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Experimental program
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Effect test

Embodiment

[0039] 1. Make hot working electrode:

[0040] (1) Evenly wind an enameled wire with a length of 14cm and a diameter of 100μm on a platinum wire with a length of 2cm and a diameter of 0.3mm, burn the two ends of the enameled wire to remove the insulating layer, and soak it in 0.1mol / L sulfuric acid solution for 10min , to remove the oxide layer formed due to fire, and then solder it on two copper enameled wires with a diameter of 0.6mm to lead out as a heating power circuit.

[0041](2) Solder one end of the platinum wire in step 1 to a copper enameled wire with a diameter of 0.6 mm and lead it out as an electrochemical detection end.

[0042] (3) Fix the whole structure on a 3.5cm×4cm×0.2cm plexiglass (the plexiglass has a window of 0.5cm×1cm in advance, such as figure 2 Middle 26), covered with the same piece of plexiglass, poured a 1:1 mixture of epoxy resin and polyamide resin between the two pieces of plexiglass, and at the same time placed a pair of two ends of the ple...

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Abstract

The present invention provides a capillary electrophoresis-thermal working electrode-ampere detecting device and a method of producing the thermal working electrode. The device comprises a high-voltage separation system, an electrochemical detecting pool, a high-voltage power source earth terminal arranged in the detecting pool, an auxiliary electrode, a reference electrode and a thermal working electrode connected with an electrochemical analytical instrument, a platinum wire of the thermal working electrode connected with an end of a separation capillary and a heating element arranged on the platinum wire. Wherein, the electrochemical analytical instrument is connected with a computer workstation. Method of producing the thermal working electrode includes steps below: producing a heating circuit and a detecting terminal on the platinum wire, connecting the platinum wire with the separation capillary, etc. The present invention integrates the capillary electrophoresis, the thermal working electrode and the ampere detector into a whole device, thus expanding scope of detecting substance and improving repeatability, stability and reliability of connection between the separation capillary and the electrode. The device has the advantages of small size and easy arrangement and effectively avoids electrochemical detecting signals being interfered by heating current. The electrode has the advantages of simple production, easy utilization and high stability.

Description

technical field [0001] The invention belongs to the field of chemical analysis, and more specifically relates to a capillary electrophoresis-thermal working electrode-ampere detection device and a method for manufacturing the thermal working electrode. Background technique [0002] Capillary electrophoresis (Capillary electrophoresis, CE) is a new type of chromatographic separation technology that is driven by a high-voltage electric field and uses a quartz capillary as a separation channel to achieve separation by utilizing the difference in electrophoretic mobility between the components of the sample. Compared with traditional gas chromatography and liquid chromatography technology, it has the advantages of high efficiency, rapidity and trace volume. At present, capillary electrophoresis technology has been widely used in pharmaceutical analysis, environmental analysis, life science analysis and other fields. [0003] Thermal working electrode technology is a new detecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/416G01N27/30
Inventor 张兰宋子旺陈国南
Owner FUZHOU UNIV
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